Anton lohbiller



(No Model.)

A. L OHBILLER.

SAFETY VALVE.

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I I I I 1 I I I I F {A n a I WH M il 1.. WJIWWHVH Lrw L Mm m I "W .Hu:enior: Min/Laminar,

Wilnesses:

llNiTED STATES PATENT ANTON LOHBILLER, OF BOSTON, MASSACHUSETTS,ASSIGNOR TO THE AMERI- CAN STEAM GAGE COMPANY, OF SAME PLACE.

SAFETY-VALVE.

SPECIFICATION forming part of Letters Patent No. 440,315, dated November11, 1890.

Application filed July 15. 1890- Serial No. 358,812. (No model.)

To aZZ whom it may concern.-

Be it known that I, ANTON LOHBILLER, of Boston, in the county of Sufiolkand State of Massachusetts, haveinvented a new and use- 5 fulImprovement in Safety-Valves, of which the following, taken inconnection with the accompanying drawings, is a specification.

My invention relates to safety-valves, and to that particular class ofsafety-valves which are known as lock-up safety-valves; and it consistsin certain novel features of construction, arrangement, and combinationof parts, which will be readily understood by reference to thedescription of the drawings, and to the claims hereinafter given, and inwhich my invention is clearly pointed out.

Figure 1 of the drawings is an elevation of a safety-valve embodying myinvention. Fig. 2 is a vertical section on line a: on on.Fig. 1,

with portions of the valve-spindle shown in elevation. Fig. 3 is avertical section on line y g on Fig. 2, with the valve-spindle, spring,spring-adj usting screw, and the levers for lifting the spindle shown inelevation. Fig. 4 is 2 5 a plan of the adjustable ring for regulatingthe escape of steam when the valve is lifted, and Fig. 5 is an edge viewof the same.

In the drawings,Ais thebase orlower section of the casing, in the centerof which is firmly 0 secured the flanged bushing B, upon the upper endof which is formed the raised annular seat a.

C is the valve fitted to said seat and provided with the usualguide-ribs to fit the in- 5 terior of the bushing B, and provided on itsunder side near its periphery with the annular groove 1), of awell-known construction, th e exterior diameter of said valvecorresponding to the diameter of the flange of the seat-sup- 4o portingbushing B, as shown in Figs. 2 and 3.

Surrounding the flange of the bushing B and the valve C is fitted theannular ring 0, so as to be freely movable vertically without rotationabout the axis of said valve, and pro- 5 vided at opposite sides withtwo slotted ears 0' c, as shown in Figs. 4 and 5.

A is the upper casing bolted to thebase or lower casing A so as toinclose the valvespindle D and spring E, and has fitted to a threadedopening in its upper end the tubu- 5o lar. screw F, in which the upperend of the spindle D has a bearing, said screw serving as a means ofadjusting the tension of the spring E in a well-known manner. ThefiangeA of the casing A is increased in thickness on two opposite sides, asshown in Fig. hand has formed in the under sides of said thickenedportions two recesses or pocket-s d d, into which the ears 0 c of thering 0 project, as shown in Fig. 2.

Two studs H H, each provided with a circumferential groove e to receivea forked ear 0' of the ring 0, and having one end portion threaded andthe opposite end fitted to receive a wrench or other means of rotatingthe same, are screwed into the base A and project upward through holesin the flange of the easing A, as shown in Figs. 1 and 2.

The casing A is provided with the branch outlet-pipe A and two slots fand g in opposite sides of its vertical wall and withoutwardly-projecting ears h and h, as shown. To the ears h is pivotedthe lever I, having near its inner end an opening for the passage of thespindle D, and constructed and arranged to bear at each side of saidopening against the under side of the collar 1', secured to or formed inone piece with said spindle, as shown in Figs. 2 and 3. To the ears h ispivoted the elbow-lever J, the short arm of which engages with the underside of the lever I at its inner end, as shown in Fig. 3, and serves asa means of removing the pressure of the spring from the valve by handwhen it is desired to have the valve blow off before the limit ofpressure at which it is set to blow off is reached.

L is a cap to inclose the set-screw F, the same being provided onopposite sides at its lower end with two inwardly-projecting seg- 9mental lips k 70, which engage with the under "sides of two similar lipsl Z, projecting outward from the hub a, surrounding the screw F, andalso provided with the ear m,which may be bolted or secured by a padlockto the ear n, cast upon and projecting upward from the upper end of thecasing A, as shown in Figs.

1 and 3, partly in dotted lines.

The lower end of the spindle D is stepped in the socket of the valve 0in a well-known manner.-

I am aware that valves having annular grooves in their under sides havebeen used 1n combination with adjustable wings or flanges for regulatingthe opening for the escape of steam when the valve is lifted, andtherefore I do not claim, broadly, such acomblnationg but so far as I amaware such regulatlng ring or flange has been constructed and arrangedto be adjusted to a higher or lower level by rotating it about the axisof the valve, and in order to adjust it the outer casing had to berevolved about its axis in the case of the flange being formed upon thelnner surface of the casing, or said casing had to be removed in thecase of the ring bemg screwed upon the valve seat or base in order togive access to the ring for. revolving the same. Both of theseconstructions are ob ectionable, the first because the upper cas- 1ng,which usually carries the levers for operating the valve, should alwaysremain in the same position in order that the lever may be operated froma given standpoint by pulling a cord, and this could not be done if thecasing was revolved about its axis, unless at each adustment the casingwas given an entire revolution, which would be entirely impractical, andthe raising or lowering of said casing would diminish or increase thetension of the spring, and thus materially affect the pressure at whichthe valve would blow ofi. The second form of construction isobjectionable because of the fact that in order to remove the uppercasing to adjust the ring, steam has to be shut ofi from thesafety-valve, and when the ring has been adjusted and the casing hasbeen replaced and steam-pressure admitted to the valve, if theadjustment is found to be unsatisfactory the casing has to beagainremoved and the ring be again adusted, and perhaps this may have to berepeated several times before the proper adustment is obtained, so thatthe valve will close after blowing off before the pressure is reducedtoo low.

I am aware that a valve has been used in combination with a ring screwedto the valve seat or bushing and provided with teeth in its periphery incombination with a casing having an opening in its side opposite saidring, which opening is closed by a plug, and when it is desired toadjust said ring the plug mustbe removed from said opening, and the ringis then adjusted by introducing a pointed implement through said openingto engage with the teeth on said ring and serve as a lever to move saidring about its axis; but this has been found to be unreliable, for thereason that the threads corrode or become gummed up, so that any toolthat can be inserted in the opening in said casing to engage with theteeth on the ring would be inadequate to move the ring. By my inventionthese objections are entirely overcome. The ring can be adjusted andreadjusted as many times as may be desired without shutting off steam orremoving any parts of the valve. The ring is not fitted so close to thevalve or seat-flange as to be liable to become stuck thereto; but ifthat were possible the means of moving it are such that there neverwould be any trouble about its being readily adjusted by means of thescrew-studs H H.

Another advantage of my construction is that the studs H H serve thedouble purpose of adjusting the ring 0 and a means of registering theupper casing centrally upon the base as their upper portions are turnedto fit accurately-reamed holes in the flange A That I claim as new, anddesire to secure by Letters Patent of the United States, is

1. The combination, in a safety-valve, of a valve provided in its underside with an annular groove, a seat-bushing having a flange of the samediameter as the valve, an adjustable ring surrounding said valve andseat-flange without being connected to either, andcircumferentially-grooved screw-studs for raising or depressing saidring to regulate the opening for the escape of steam and the time ofclosing said valve after blowing off.

2. In combination with the base A, the seat a, and the valve 0, the ring0, provided with the slotted ears 0 c, the casing A, provided with therecesses d d, reamed holes through its flange above said recesses, andthe circumferentially-grooved screw-studs H H, set in threaded holes inthe baseA and serving the double purpose of adjusting said ring 0 andregistering the casing A centrally upon the base A, substantially asdescribed.

3. The combination of the base A, the flanged bushing D, having formedthereon the seat a, the valve 0, provided with the groove 1) and havinga diameter corresponding to the ring 0, provided with the slotted ears0' c and arranged to surround said valve and setflange Without beingconnected to either, the casing A, provided with recesses d d to receivethe ears 0' o of the ring 0, and the grooved screw-studs H II, set inthreaded holes in the base A, engaging by their grooves the slotted ears0 c and projecting through and above the flange A of the casing,substantially as and for the purposes described.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, on this 9th day of July, A. D.1890.

ANTON LOHBILLE R.

Witnesses:

N. O. LOMBARD, WALTER E. LOMBARD.

diameter of the flange of the bushing D, the

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